TY  - BOOK
AU  - Johnson Douglas L
AU  -  Lewis Laurence A
TI  - Land degradation :  Creation and destruction   
T2  - Natural Environment
U1  - U673:(G:55), N5/TD 
PY  - 1995///
CY  - Cambridge
PB  - Blackwell          
KW  - Geography
N1  - Bib p. 306-28
ER  -